weaves



(No Model.) 2 Sheets-Shet 1. I. D. WEAVER.

ROTARY BLOWER.

Patented June 16, 1885.

e \e w J K? @Y b \w k \IIHI N W M w. Q M3 W l n .&

INVENTOR WITNESSES W%/@JZQ ATTORNEYS.

N. PETERS, PholoLilhognphe (No Model.) 2 Sheets Sheet 2.

I. D. WEAVER.

ROTARY BLOWER.

No. 320,196. Patented June 16, 1885.

wmmssns INVENTOR @TiZ/Qmm,

J Max/1 6C? fj I v -BY ATTORNEYS.

ISAAC D. WEAVER, or LEBANON, PENNSYLVANIA, ASSIGNOR TO HIMSELF ANDBENJAMIN F. HARPEL, or sAME rLAcE.

ROTAQRY BLOWER.

SPECIFICATION forming part of Letters Patent No. 320,196, dated dune'16, 1885.

Application filed March 4, 1884. No model.)

aZZ whom it may concern:

Be it known that I, IsAAc D. WEAVER, of Lebanon, in the county ofLebanon and State of Pennsylvania, have invented a new and ImprovedRotary Blower, of which the following is a full, clear, and exactdescription.

My invention consists of the construction and arrangement of parts aswill be hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a transverse sectional elevation of my improved rotaryblower. Fig. 2 is partly a side elevation and partly a longitudinalsectional elevation. Fig. 3 is an inside elevation of one of the coversof the cylinder. Fig. 4 is a front elevation of one of the wings, andFig. 5 is an end elevation of a wing.

I make a cylindrical case, a, with an offset, b, or equivalent deviceinthe inner periphery to let the air-pressure balance on both sides of thewings at the point where they begin to close, said case being alsoconstructed with inlet-openings c and discharge-openings d; also, withan abutment, e, and a packing, f, between said openings to prevent theair from being forced back to the inlet-openings. In the center of thiscylinder I arrange a drum, 9, on a shaft, 71, and close in said drum byheads t to the cylinder, in the center of which the shaft-bearings j arefitted by a flange, 7t, in an annular recess, Z, surrounded by a flange,m, and secured by bolts 11. and adjusting-screws 0, by which thebearings may be shifted from time to time to center the shaft. In theperiphery of the drum I fit two or more wings, 12, by a pivot, q, formedon the inner edge of the wings and working in a socket-groove in the hubsuitably for the wings to close for passing the abutment and to openinto the space for driving the air, and on each end of the wings Iarrange an arm, 8, with a roller, t, on the end of the arm running in agroove in the head i, suitably formed to open and close the wings asrequired in their rotation around the cylinder and past the abutment.The grooves are constructed with a section, u, on a large radius, alongwhich the rollers pass to keep the wings closed while passing theabutments, and with a section, '0, on a smaller radius, in which therollers pass to hold the wings open when forcing the air; also, with asection, w, along which said rollers run to open the wings, and also asection, 00, in which said rollers pass to close the wings. Where thegrooves extend radially beyond the drum, plates y are fitted in recessesz of the heads to cover the grooves and prevent the air from escapingback past the ends of the wing through the grooves and the recesses amade in the heads for the arms 8. The

drum 9 is made with suitable recesses, b, in

which the wings close when passing the abut- 6 ment, and the bottoms ofthe recesses and the sides of the wings closing into them are grooved,as shown in Fig. 1, to provide space in which oil or other fluid orsolid matters that may happen to lodge between them may have space toprevent obstructing the closing of the wings. Inside of the drum Iarrange an adjustable key, 0, on the face of a lug, d,

on the drum, and in suitable relation to each arm of the wings for abearer to take the thrust of the wings from the rollers when forcing theair, and so that by careful adjustment of the wings the friction of theouter edges on the surface of the case may be limited as desired, andthe wings may be adjusted as to the extent of their opening from time totime as the outer edges wear away. The keys 0 are bolted to the sides ofthe lugs by bolts 6, fitted in slotted holes of thekeys,and areconnected to the ends of said lugs by adjustingg screws (1 for enablingthe keys to be accurately shifted. The arms, thus relieved of supportingthe wings against the resistance of the air, have only to move the wingsin closing and opening them, and therefore may be offset at f beyond theends of the drum into the recess a, and may also be recessed at g to runbehind the covers y, and will still be sufficiently strong for theservice required of them. The packing-plate f is fitted adjustably onthe abutment e by means of slotted holes through it for theattaching-bolts h to take up the slack from time to time.

To confine the pivots q of the wings p in their bearing-sockets in thedrum, said pivots 10 may have strap or loop hinges p", fitted flush andloosely in sockets 1)", around the pivots and secured to the drum, andthe pivots may be flanged at the ends or elsewhere, as shown at x, toreceive the keepers y for securing the wing-pivots more firmly in place.

With these improvements in the construe tion of the rotary blowersconsiderable compression can be obtained to better advantage than can beeffected with the common reciprocating compressors by avoiding the lossdue to the rise and fall of the valves, and the waste in the clearancespaces of the cylinder and passages.

The operation of the machine is as follows: The wings p swing out so asto close against the inner periphery, a, of the drum immediately afterpassing the abutment e; partly by the effect of centrifugal force, butmainly and positively by the rollers t of the'wing-arms s passing alongthe inclined part of the cam groove from part at to part '0, and forcethe air in advance of them out through dischargeopenings d, the airbeingdrawn in through passages c by the suction behind said wings. When onewing has passed the abutment and opened against the rim (1, the one inadvance has arrived at the point where it begins to close, and itsroller 16 then runs along part :0 of the cam-groove with which saidrollerenters about the time the forward edge of the wing reaches thedepression I). The rear wing then takes the resistance ofthe air, theclosingwing being relieved by the opening which the depression makes tothe back of the wing so that the closing of the wing for passing theabutment is not opposed by the pressure of theair. The wings thus openand close successively, the open one forcing the air while the closedone is passing the abutment, which is the means of permitting the escapeof the compressed air back to the suction side of the blower.

Having thus described my invention,I claim as new and desire to secureby Letters Patent- 1. The combination, in a rotary blower, of thecylinder at, having offset 12 and abutment e, heads 2', having recessesa and groovesu v w m, and drum g, having swinging wings p,

hinged thereto, said wings having arms 8, V

ofl'set at f, and rollers 15, and said rollers 1. ar-

ranged to run in the grooves for opening andclosing the wings,substantially as described. 2. The combination of the adjusting-keys 0,attached to lugs d of the interior of the drum, with the arms 8 of thewings p, pivoted in the periphery of the drum, substantially asdescribed. 3. The combination, with cylinder head 5, provided with aflanged-recess, lm, of the shaft-bearing j, provided with the flange k,of less diameter than that of the said recess andresting against thecylinder-head, screws 0, passing through flange m into the cylinderhead,and screws 12, passing through flange it into head i, substantially asset forth.

1 ISAAC D. WEAVER. Witnesses:

E. G. FAUBERN, C. W. FELD.

